Simulations of Australian extreme rainfall and circulation during the January 2011 La Nina

Jennifer Whelan, Jorgen Frederiksen

Abstract


We examine the synoptics and the role of different classes of dynamical disturbances, from both observations and ensemble simulations, during of one of Australia's most severe flooding events in January 2011. We analyse ensemble simulations using the CSIRO M3L general circulation spectral model. Using wavenumber extraction techniques and dynamical mode analyses, we note the collision and convective coupling of Kelvin waves and the Madden--Julian oscillation in the Australian monsoonal region. Model simulations and the dynamical analyses are consistent with the synoptic situation, and provide a more complete explanation for the extensive precipitation impacts over Australia during January 2011.

References

Keywords


climate modeling, normal modes, instabilities, ENSO

Full Text:

PDF BIB


DOI: http://dx.doi.org/10.21914/anziamj.v56i0.9353



Remember, for most actions you have to record/upload into this online system
and then inform the editor/author via clicking on an email icon or Completion button.
ANZIAM Journal, ISSN 1446-8735, copyright Australian Mathematical Society.